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Shield reinforcing construction process

A construction technology and shield technology, applied in mining equipment, earthwork drilling, tunnels, etc., can solve the problems of inability to meet the construction conditions of cement reinforcement and the construction risk of freezing and freezing cutter head at the bottom of the cup, so as to solve the risk of landslide and prevent construction. effect of risk

Inactive Publication Date: 2020-11-10
SHANGHAI MECHANIZED CONSTR GRP
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Problems solved by technology

In addition, the horizontal freezing method will be used. In the conventional horizontal freezing method, the outer ring freezing method and the cup bottom freezing method are used for construction. In order to ensure the construction safety in the process of digging the hole, the cup bottom freezing cannot be cancelled.
[0004] A certain amount of space is needed to place equipment during the cement-based reinforcement construction process, but the surrounding environment in the current urban rail transit construction process is relatively complex, which often cannot meet the cement-based reinforcement construction conditions; and the bottom of the cup freezes, causing the construction risk of freezing the cutter head

Method used

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Embodiment Construction

[0025] The specific implementation manner of the present invention will be described in more detail below with reference to schematic diagrams. The advantages and features of the present invention will be more apparent from the following description. It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

[0026] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right" etc. is based on the orientation or positional relationship shown in the drawings , is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orien...

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Abstract

The invention discloses a shield reinforcing construction process. A shield lanuching reinforcing soil body and a receiving reinforcing soil body are each divided into a first area soil body and a second area soil body along a shield excavation path, and the shield reinforcing construction process comprises the following steps that S1, reinforcing the first area soil bodies by adopting a high-pressure jet grouting pile and / or a three-axis mixing pile, and constructing the second area soil bodies by adopting a freezing method; and S2, performing freezing method construction on the outer ring ofa shield tunnel entrance door or a shield tunnel exit door in a lanuching well or a receiving well, and arranging freezing pipes in a circle shape, wherein the diameter of the circle is larger than that of the shield tunnel entrance door and that of the shield tunnel exit door. The shield reinforcing construction process can be applied to the situation that the surrounding environment is complexin the urban rail transit construction process, and a cutterhead can be effectively prevented from being frozen.

Description

technical field [0001] The invention relates to the technical field of shield tunneling engineering construction, in particular to a shield tunnel reinforcement construction technology. Background technique [0002] At present, the shield tunneling method is widely used in subway construction in various parts of my country. The shield tunnel enters the tunnel stratum from the working well or is pushed out from the end of the tunnel to enter the working well. For sandy soil or saturated water-containing clay, if it is not reinforced, a large amount of soil and groundwater will collapse into the working well behind the working well enclosure, resulting in a large area of ​​ground subsidence around the cave, endangering the underground Pipelines and nearby buildings. Therefore, before the shield machine enters and exits the tunnel, the ground at the tunnel door must be reinforced. [0003] At present, there is a relatively mature technology for the reinforcement of the shield e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E21D9/06
CPCE21D9/001E21D9/06
Inventor 陈嘉瑜毛文祺吴赵友章庆王琦徐骏春苏晨鸣张定国彭卫兴刘红果刑浩毅
Owner SHANGHAI MECHANIZED CONSTR GRP
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